Primer retainer bushing

ABSTRACT

A primer mounting assembly and method of assembly for reliably and reproducibly fixedly mounting an initiator means such as a primer means or a detonator means within munitions by press fitting to avoid misfire and unsafe munitions.

llnited States Patent Berlin et al. Sept. 12, 1972 [54] PRIMER RETAINER BUSHING [56] References Cited [72] Inventors: Aaron S. Berlin, Wilmington, Del; UNITED STATES PATENT'S Vincent C. Little, Fallston; Toney Leadol-e, Haw-e de Grace both of 679,792 8/1901 Stuart ..lO2/86.5 2,763,212 9/1956 McCaslin ..l02/73 R X 2,590, [73 Assignee: The United States of America as 671 3/1952 Baker 102/24 represented by the Secretary of the Primary Examiner samuel Engle AttorneyHarry M. Saragovitz, Edward J. Kelly, Herbert Ber] and Bernard J. Ohlendorf [21] 75006 A primer mounting assembly and method of assembly v for reliably and reproducibly fixedly mounting an in- [52] US. Cl..... ..102/70 R, 102/865 itiator means such as a primer means or a detonator [51] Int. Cl. ..F42c 19/08 means within munitions by press fitting to avoid [58] misfire and unsafe munitions.

Field or Search.,...,.102/44, 45, 86.5, 70, 73-76, ,102/24;8;6/1,32

4 Claims, 5 Drawing Figures PATENTEDsme I972 3.690.258

Fig.5

3 PRIOR ART l/WEA/TORS Aaro .5. Berlin Vina iff/e Toney E. adore ATTOR EYJ DEDICATORY CLAUSE The invention described herein may be manufactured, used, and licensed by or for the Government for governmental purposes without the payment to us of any royalty thereon.

Our invention relates to a means and method for retaining an initiator means such as a primer means or a detonator means in a munition, such as the fuze and system for delivering a payload disclosed and claimed in US. Pat. application Ser. No. 757,298 filed Sept. 4, 1968, now U.S. Pat. No. 3,618,524.

In'the prior art, initiator means, as used in the aforementioned US Pat. application Ser. No. 757,298, now US. Pat. No. 3,618,524, and shown in instant FIG. 3,

were held in place within the munition by conventional staking technique. However, conventional staking technique resulted in initiator mountings which became loose-by handling or improperassembly prior tothe firing of the-munition, and the loose initiator mounting resulted in a misfire of the munition. Our invention was conceived and reduced to practice to overcome the problem of loose initiator means mounting and munition misfiring and to satisfy the long felt need fora means and method to mount an initiator means within a munition which was reliable, efiective, safe and reproducible.

A principal object of our invention is to provide a means and method for mounting an initiator means within a munition which is reliable, effective, safe, and reproducible to prevent the initiator mounting means from becoming loose under any assembly, storage, and/or handling conditions prior to firing of the munitions and to avoid munition misfiring and unsafe condition.

Other objects of ourinvention will be obvious or will appear from the specification hereinafter set forth.

. FIG. 1 is an end view of the fuze shown in FIG. 2, the end view being cut away to show the cam release mechanism.

FIG. 2 is a sectional view of a fuze using our initiator mounting means and method.

FIG. 3 is a view of the prior art means and method of mounting an initiator means within a munition by the staking technique.

FIG. 4 is an enlarged view of the initiator sleeve as sembly shown in FIG. 2.

FIG. 5 is a view of the bushing structure for our initiator mounting means and method.

Our invention as shown in FIGS. 1 to 5 will now be described in detail as follows.

As shown in FIG. 3, the prior art technique involved placing initiator means 1 within sleeve 2 and anchoring the means 1 within sleeve 2 by turning stake means 3 inward to embed stake means 3 within initiator means 1. The staking mode proved ineffective, as previously described, and necessitated using our initiator mounting means as shown in FIGS. 4 and 5. Our means and method involves forming a plurality of annular recesses 4 on a tapered bushing member shown at 5 in FIG. 5; bushing member 5 being of a harder material, such as steel, than sleeve 2 which is made of a material such as zinc or a zinc alloy. While the material for bushing 5 and sleeve 2 can be selected within the skill of the art to sleeve 2. An undersized tapered hole is formed in sleeve 2 to accommodate bushing 5, and initiator means 1 is placed in the sleeve within the tapered hole and resting on bottom surface 6 of the tapered hole. Bushing 5 is press fit within the tapered hole at a predetermined pressure to insure initiator means 1 being fixedly held against surface 6. Press fitting causes the softer sleeve 2 material to fill recesses 4 of bushing 5 and hold initiator means I firmly and fixedly in place. Our means and method for initiator means mounting has demonstrated that striker means 7 of the fuze shown at 8 in FIG. 2 will reliably detonate initiator means 1 and prevent misfires when striker means 7 is released upon activation of ball means 9; the activation of the ball means and other components being described in aforementioned US. Pat. application Ser. No. 757,298, now US. Pat. No. 3,618,524, and not being a part of this invention. The munition shown in FIGS. 1 and 2 is shown merely to demonstrate the utility of our initiator mounting means and method and not as a limitation thereof, because our inventive initiator mounting means and method can be utilized within the skill of the art for any suitable munition application.

It is obvious that other modifications can be made of our invention, and we desire our invention to be limited only by the scope of the appended claims.

We claim:

1. A munition for delivering a payload within the munition to a target comprising a firing pin means to detonate an initiator means, a firing pin release means, an initiator means to activate a means to disseminate the payload, and a sleeve means to enclose the initiator means wherein the improvement in combination therewith comprises a tapered hole within the sleeve means containing the initiator means and adapted to accommodate a bushing means; a bushing means having larger dimensions than the tapered hole and formed of a harder material than the sleeve means, said bushing means being press fit within the tapered hole to anchor the initiator means within the tapered hole, the bushing means being a structure having a plurality of annular recesses formed in the outer wall of the structure, said recesses being adapted to be filled with the material of which the sleeve means is formed when the bushing means is press fit into the sleeve means.

2. The munition of claim 1 wherein the initiator means is a primer means.

3. The munition of claim 1 wherein the initiator means is a detonator means.

4. The munition of claim 1 wherein the bushing means is formed of steel and the sleeve means is formed Of a material selected from the group consisting of zinc and zinc alloys. 

1. A munition for delivering a payload within the munition to a target comprising a firing pin means to detonate an initiator means, a firing pin release means, an initiator means to activate a means to disseminate the payload, and a sleeve means to enclose the initiator means wherein the improvement in combination therewith comprises a tapered hole within the sleeve means containing the initiator means and adapted to accommodate a bushing means; a bushing means having larger dimensions than the tapered hole and formed of a harder material than the sleeve means, said bushing means being press fit within the tapered hole to anchor the initiator means within the tapered hole, the bushing means being a structure having a plurality of annular recesses formed in the outer wall of the structure, said recesses being adapted to be filled with the material of which the sleeve means is formed when the bushing means is press fit into the sleeve means.
 2. The munition of claim 1 wherein the initiator means is a primer means.
 3. The munition of claim 1 wherein the initiator means is a detonator means.
 4. The munition of claim 1 wherein the bushing means is formed of steel and the sleeve means is formed of a material selected from the group consisting of zinc and zinc alloys. 